One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10,13,16)(11,15,12,14)(17,18,20,23)(19,27,29,32)(21,26,22,25)(24,28,31,30)(1,3,5,4)(2,6,7,8)(18,23)(19,28)(21,22)(24,27)(29,30)(31,32)(1,4,5,3)(2,6,7,8)(10,14)(11,12)(15,16)(17,19,20,29)(18,24,23,31)(21,28,22,30)(25,32,26,27)(2,7)(6,8)(9,11,13,12)(10,15,16,14)(18,23)(19,29)(25,26)(28,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.